/*
* FLINT PARTICLE SYSTEM
* .....................
* 
* Author: Richard Lord
* Copyright (c) Richard Lord 2008-2011
* http://flintparticles.org
* 
* 
* Licence Agreement
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

package org.flintparticles.common.initializers;

import nme.display.DisplayObject;
import nme.filters.BitmapFilter;
import org.flintparticles.common.particles.Particle;
import org.flintparticles.common.emitters.Emitter;
import org.flintparticles.common.initializers.InitializerBase;
import org.flintparticles.common.initializers.ApplyFilter;


/**
 * The ApplyFilter Initializer applies a filter to the particle's image.
 */

class ApplyFilter extends InitializerBase
{
	public var filter(filterGetter, filterSetter):BitmapFilter;
	private var _filter:BitmapFilter;
	
	/**
	 * The constructor creates an ApplyFilter initializer for use by 
	 * an emitter. To add an ApplyFilter to all particles created by an emitter, use the
	 * emitter's addInitializer method.
	 * 
	 * <p>This initializer has a priority of -10 to ensure it occurs after the 
	 * image assignment initializers like ImageClass.</p>
	 * 
	 * @param filter The filter to apply.
	 * 
	 * @see org.flintparticles.common.emitters.Emitter#addInitializer()
	 */
	public function new( filter:BitmapFilter = null )
	{
		super();
		priority = -10;
		_filter = filter;
	}

	
	/**
	 * The filter to apply to each particle's image when it is created.
	 */
	private function filterGetter():BitmapFilter
	{
		return _filter;
	}
	private function filterSetter( value:BitmapFilter ):BitmapFilter
	{
		_filter = value;
		return _filter;
	}
	
	/**
	 * @inheritDoc
	 */
	override public function initialize( emitter:Emitter, particle:Particle ):Void
	{
		if( particle.image != null && Std.is(particle.image, DisplayObject) )
		{
			var img:DisplayObject = particle.image;
			if( img.filters != null )
			{
				var filters:Array<Dynamic> = img.filters;
				filters.push( _filter );
				img.filters = filters;
			}
			else
			{
				img.filters = [ _filter ];
			}
		}
	}
}
